Brake-operating mechanism



M 10 1927. 1,628,060 ay J. s. PAYNE BRAKE OPERATING MECHANISM Filed July 10. 1926 2 Sheets-Sheet 1 -FIG.1:-

May 10 1927. A J. S. PAYNE BRAKE OPERATING MECHANISM 2 Sheets-Sheet 2 Filed July 10. 1926 WTNESSES I M Patented May 10, 1927.

nearer) STATES JOHN s. PAYNE, or MIDLAND PARK, NEW JERSEY.

BRAKE-OPERATING MECHANISM.

Application filed July 10,

My invention relates to brake operating mechanism of increased power, and its object is to provide a mechanism of such character, which will multiply the power applied to the hand-wheel and transmit it to the brake lever, so that a force of great magnitude may be obtained to operate the brake lever. Another object is to provide such a mechanism which will be of simple, rugged, and compact construction, and which can be readily and economically manufactured and installed. A further object is to provide such a mechanism, which will be conveniently accessible to the operator, and which will not obstruct space that it is desirable to keep clear. Other objects of the invention will hereinafter readily appear.

Snow plows heretofore in practice have had both an air cylinder and a hand wheel for operating the brake lever. It is particularly desi able that the power applied to the brake lever by the hand wheel be as great in magnitude as that applied by the brake cylinder. None of the heretofore known devices has been capable of developing the requisite power. A further objection to such devices is that the hand-wheel shaft was disposed vertically at the side of the plow, thus interfering with free passage of the operator along the running board.

My improved brake operating mechanism has the important advantage that it enables the power applied to the hand-wheel to be transmitted to the brake lever, multiplied to any desired extent. A further advantage is that it occupies a minimum of space, and locates the hand-wheel at such a position that, while it is conveniently accessible to the operator, it does not obstruct the running board.

The in'iprovement claimed is hereinafter fully set forth.

In the accompanying drawings: Figure 1 is a side view, in. elevation, of a snow plow, a portion of the side wall of the plow being broken away to show my improved mechanism; Fig. 2, a transverse section, on the line a. a. of Fig. 1; Fig. 3, an enlarged elevation of the mechanism; and, Fig. 4:. a section tale en on the line Z) l) of Fig. 3, looking in the: direction of the arrows.

For the purpose of presenting a clear understanding of my invention, 1 have illustrated the same installed on a snow plow of usual construction.

In the practice of my invention, referring 1926. Serial No. 121,602.

descriptively to the specific embodiment thereof which is 1 herein exemplified, the brake. cylinder, 10, the bralre lever, 11, and the boiler, 12, are all of well known construction.

The handwheel, 13 is secured to the shaft, 1%. journalled in the bracket. 15, bolted to the shell of the boilernear the. top, and'on one side thereof. Thus the hand wheel does not obstruct the running board, and is conveniently accessible to the operator. One end of a chain, 16, is secured to the hand wheel shaft, 141, so that when the hand wheel is turned, the chain will be wound on the shaft. i-i ratchet, 17, pawl, 18, and latch, 19, all of usual construction are provided to automatically lock the shaft against rotation in a reverse direction, and to release it when desired. 7

The chain, 16, passes from the hand wheel shaft, down the side of the boiler, over the sheave, 20, which is secured to the boiler shell, and thence to the drum, 21, to which its other end is attached. The chain is wound on the drum four turns, so that when one end of the chain is wound on the hand wheel shaft, the other end will unwind from the drum, rotating the same.

The drum, 21, is mounted on a shaft, 29., journalled in a frame, 23, secured to the longitudinal frame members, 24, of the plow. The drum shaft carries a small gear, 25,-that meshes with a larger gear. 26, mounted on a shaft, 97. journalled in the frame, 23.

One end of a chain, 28, is attached to the shaft, 27, and the other end to the brake lever, 11.

The operation of the mechanism is as follows lVhen the hand wheel, 13, turned, one end of the chain, 16, will wind around the hand wheel shaft, 1 1, producing correspond ing unwinding of the other end of the chain from the drum with consequent rotation of the drum. The turning of the drum effects rotation of the shaft, 22, the small gear. 25, the large gear, 26, and the shaft, 27. The turning of the shaft 27, causes one end of the chain. 28, to wind thereon, whereby the power applied to the hand wheel is transmitted to the brake lever, 11, increased in magnitude. It will, of course, be obvious that the relative diameters of the drum and shafts may be varied to'multiply the power to any desired extent.

From the foregoing description, it will be Hill obvious that I have provided a brake operating mechanism, which, While of compact construction, is capable of increasing the power applied to the hand Wheel to any desired extent, and transmitting it to the brake lever. Further, it is to be noted that the improved construction disposes the hand Wheel at a position conveniently accessible to the operator, and avoids obstruction of the space which it is desirable to keep clear.

If desired, the construction may be structurally modified by omitting the shaft, 27, and extending the drum shaft to provide a reel on which the chain, 28, will be Wound.

I claim as my invention and desire to secure by Letters Patent:

1. In a brake operating mechanism, the combination of a brake lever; a shaft; a flexible member connected to the lever and the shaft; and adapted to be Wound around the shaft; a second shaft; a driving connection between the first and second shafts; a drum mounted on the second shaft;'a third shaft; and a flexible member having one end Wound around the drum, and the other end attached to the third shaft.

2. In a brake operating mechanism, the combination of a brake lever; a shaft; a flexible member, connected to the lever and the shaft, and adapted t o'be Wound around the shaft; a large gear Wheel. on the shaft; a second shaft; a smaller gear wheel, on the second shaft, meshing with the large gear; a drum, mounted on the second shaft; a third shaft; and a flexible member, having one end Wound around the drum and the other end attached to the third shaft.

JOHN S. PAYNE. 

